.chang{
    width: 1000px
}
.h1{
    font-size: 20px 
}
.wenben{
    font-size: 16px 
}
.img{
    width: 300px;
    height: 182px
}
.caidan{
    border: 1px solid #d2d2d2;
    width: 200px;
    height: 238px;
    border-radius:12px;
    margin-bottom: 40px;
}
.bian{
    width: 100px; 
    height: 100px;
    border-right: none;
    margin: 50px
}

.dibu{
    background-color: #000; 
    width:100%;
    height:260px 
}